Interactive Age Map For NYC Buildings

JMG reader David points us to this nifty interactive map that reveals the construction date of New York City buildings. My Upper East Side building went up in 1910 and my super once explained that it was built as "overnight dorms" for the doctors at what is now Sloan-Kettering, which is down the street. According to the super, this was a "shit neighborhood" at the time and doctors wouldn't live around here. Anyway, cool map.